Before Carrying Out Troubleshooting Of Electrical System - Komatsu Galeo PC800-8 Shop Manual

40 Troubleshooting
Troubleshooting of electrical system (E-mode)

Before carrying out troubleshooting of electrical system

Connection table of circuit breakers
a This connection table shows the devices to which each power supply of the circuit breakers supplies power
(A switch power supply is a device which supplies power while the starting switch is at the ON position and
a constant power supply is a device which supplies power while the starting switch is at the OFF position).
a When carrying out troubleshooting related to the electrical system, you should check the circuit breakers
first to see if the power is supplied normally.
Type of power Circuit breaker
supply
Switch power supply
(Battery relay
terminal M)
Constant power
supply
(Battery relay
terminal B)
PC800, 850-8
Circuit breaker
No. capacity
1 40 A
2 20 A
3 20 A
4 20 A
5 20 A
6 20 A
7 20 A
8 20 A
9 20 A
Destination of power
Fuse box (Fuses No. 1 – 15)
Boom working lamp, right head lamp
Grease pump
Pump controller power source
Head lamp on cab
Starting switch and engine controller (Power supply control)
Engine controller power supply relay (Power supply drive)
Machine monitor
Fuse box (Fuses No. 16 – 19)
SEN00793-02
3